PAC2013 - List of Authors (Hughes, C.)

Paper	Title	Page
THPSM13	Characterisation of Nitrogen Clusters and Gas Jet Targets Under Varied Nozzle Geometries	1412
	C. Hughes, N. Dover, Z. Najmudin, P.A. Posocco Imperial College of Science and Technology, Department of Physics, London, United Kingdom
	Funding: C. Hughes was supported by the Ogden Trust. Gas jets are widely used for targets in laser-plasma driven article acceleration experiments. Optimising the mechanism requires tailored gas jet density profiles. Therefore, high density gas profiles have been investigated and characterised using different types of nozzles: sonic, supersonic, slit and supersonic slit. Gas jet profile optimisation was examined using nozzles of different diameters while varying gas pressure between 0 and 100 bar and valve opening duration. Gas jets produced by the nozzles were characterised using an optical probe laser. The gas jet density profile was measured through interferometry which was captured using a CCD camera. A second camera was used to record the Rayleigh scattering from the laser to confirm the presence clustering in nitrogen at high pressures.

Paper

Title

Page

Characterisation of Nitrogen Clusters and Gas Jet Targets Under Varied Nozzle Geometries

1412

C. Hughes, N. Dover, Z. Najmudin, P.A. Posocco
Imperial College of Science and Technology, Department of Physics, London, United Kingdom

Funding: C. Hughes was supported by the Ogden Trust.
Gas jets are widely used for targets in laser-plasma driven article acceleration experiments. Optimising the mechanism requires tailored gas jet density profiles. Therefore, high density gas profiles have been investigated and characterised using different types of nozzles: sonic, supersonic, slit and supersonic slit. Gas jet profile optimisation was examined using nozzles of different diameters while varying gas pressure between 0 and 100 bar and valve opening duration. Gas jets produced by the nozzles were characterised using an optical probe laser. The gas jet density profile was measured through interferometry which was captured using a CCD camera. A second camera was used to record the Rayleigh scattering from the laser to confirm the presence clustering in nitrogen at high pressures.